Not financial, legal, or tax advice. This guide is for general education only. Stablecoins carry risks, including the risk that a coin loses its peg. Do your own research and consider consulting a qualified professional before relying on them.

Stablecoins are cryptocurrencies designed to hold a steady value, usually pegged one-to-one to a currency like the US dollar. They aim to give you the speed and flexibility of crypto with far less of the price volatility, which makes them a common tool for saving, trading, and moving money on a blockchain.

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What stablecoins are

Most cryptocurrencies swing in price, sometimes violently. That makes them exciting to some investors and impractical for everyday payments or for parking value. Stablecoins were created to solve that problem. A stablecoin is a token, typically issued on a network like Ethereum or Solana, that is engineered to track the value of a stable reference asset, most often the US dollar.

Because they live on a blockchain, stablecoins move with the same speed and openness as other crypto (see What Is Cryptocurrency), while aiming to stay close to a familiar value. That blend is why they have become one of the most widely used categories in the whole space.

The main types of stablecoin

Not all stablecoins keep their value the same way. The main approaches are:

Fiat-backed stablecoins. These are backed by reserves of traditional money and equivalents held by the issuer. For every token in circulation, the issuer aims to hold a matching dollar (or near-cash asset) in reserve. The largest stablecoins today work this way. For a direct comparison of two leading examples, see USDT vs USDC.

Crypto-backed stablecoins. These are backed by other cryptocurrencies locked in smart contracts. Because the collateral is itself volatile, these systems usually require more collateral than the value of the stablecoins they issue, providing a buffer against price swings.

Algorithmic stablecoins. These try to hold their peg using rules and market incentives rather than holding full reserves. This category has proven especially fragile, and some high-profile algorithmic stablecoins have collapsed, wiping out holders. Treat them with particular caution.

How pegs actually work

A peg is simply the target value a stablecoin tries to maintain, such as one dollar. Keeping that peg depends on the design.

For fiat-backed coins, the promise is that you can always redeem one token for one dollar from the issuer, so the market price stays near a dollar because arbitrage traders profit whenever it drifts. For crypto-backed coins, over-collateralization and automated liquidations defend the peg. For algorithmic coins, the peg relies on incentives that can break down under stress.

The key insight is that a peg is a claim about a mechanism working, not a law of nature. When the mechanism or the trust behind it weakens, a stablecoin can lose its peg, meaning it trades below its target value. This has happened even to large, well-known stablecoins during periods of stress, though the biggest fiat-backed coins have generally recovered.

What people use stablecoins for

Stablecoins serve several practical purposes:

  • A resting place between trades. Investors often move into stablecoins to step out of volatility without leaving the crypto ecosystem entirely.
  • Payments and transfers. They allow fast, low-cost transfers across borders, at any hour.
  • Access to decentralized finance. Stablecoins are heavily used for lending, borrowing, and earning yield in What Is DeFi.
  • Saving in a familiar unit. For people in regions with unstable local currencies, dollar-linked stablecoins can be a way to hold value, though they carry their own risks.

Risks to understand

  • Peg risk. A stablecoin can lose its peg and trade below its target, especially under stress or if reserves are questioned.
  • Issuer and reserve risk. For fiat-backed coins, you are trusting that the issuer actually holds sufficient, high-quality reserves and will honor redemptions.
  • Smart contract risk. Stablecoins on a blockchain depend on code that could contain bugs.
  • Regulatory risk. Stablecoins are a focus of regulators worldwide, and rules are evolving.
  • Not a savings account. Holding a stablecoin is not the same as a bank deposit and generally carries no equivalent protection.

How to get started

If you are new, begin with the basics of how crypto and wallets work (What Is Cryptocurrency, What Is a Crypto Wallet). When choosing a stablecoin, favor established, transparent, fiat-backed options and understand who issues them and how they are backed. Comparing leading choices, as in USDT vs USDC, is a useful step before you hold any meaningful amount.

Park value in stablecoins between buys. When you want to step back from volatility without cashing out entirely, stablecoins give you a steady place to hold value inside your crypto plan. Hodl Up makes it simple to move between your holdings and stablecoins as your strategy shifts.